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DOI | 10.1029/2019JD030680 |
A Stochastic Representation of Temperature Fluctuations Induced by Mesoscale Gravity Waves | |
Kaercher, B.1; Podglajen, A.2,3 | |
2019-11-13 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:21页码:11506-11529 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; France |
英文摘要 | Ubiquitous mesoscale gravity waves generate high cooling rates important for cirrus formation. We make use of long-duration balloon observations to devise a probabilistic model describing mesoscale temperature uctuations (MTF) away from strong wave sources. We define background conditions based on observed probability distributions of temperature and underlying vertical wind speed fluctuations. We show theoretically that MTF are subject to damping at a rate near the Coriolis frequency when the vertical wind speed fluctuations are autocorrelated over a fraction of a Brunt-Vaisala period. We find that for background wave activity, a decrease in temperature of 1K translates into cooling rate standard deviations and mean updraft speeds of 4-8Kh(-1) and approximate to 10-20 cms(-1), respectively, depending on latitude and stratification. We introduce an effective Coriolis frequency to generate cooling rates in equatorial regions consistent with balloon data. Above ice saturation, MTF are large enough to affect ice crystal nucleation. Our results help constrain uncertainty in aerosol-cirrus interactions, provide insights to better meet challenges in comparing measurement data with model simulations, and support the development of cutting-edge ice cloud schemes in global models. |
英文关键词 | gravity waves cirrus clouds |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000496065700001 |
WOS关键词 | HOMOGENEOUS ICE NUCLEATION ; TROPICAL TROPOPAUSE LAYER ; VERTICAL VELOCITY ; UPPER TROPOSPHERE ; CIRRUS CLOUDS ; MIDLATITUDE CIRRUS ; NUMBER DENSITY ; PART 1 ; SIMULATIONS ; DYNAMICS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/225769 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Deutsch Zentrum Luft & Raumfahrt DLR Oberpfaffenh, Inst Phys Atmosphere, Wessling, Germany; 2.Forschungszentrum Julich, Inst Energie & Klimaforsch Stratosphare IEK7, Julich, Germany; 3.Univ Paris 06, Lab Meteorol Dynam, Inst Pierre Simon Lapl, Ecole Normale Super,Ecole Polytech,CNRS UMR8539, Paris, France |
推荐引用方式 GB/T 7714 | Kaercher, B.,Podglajen, A.. A Stochastic Representation of Temperature Fluctuations Induced by Mesoscale Gravity Waves[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(21):11506-11529. |
APA | Kaercher, B.,&Podglajen, A..(2019).A Stochastic Representation of Temperature Fluctuations Induced by Mesoscale Gravity Waves.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(21),11506-11529. |
MLA | Kaercher, B.,et al."A Stochastic Representation of Temperature Fluctuations Induced by Mesoscale Gravity Waves".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.21(2019):11506-11529. |
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